yii2 上传图片的示例代码

2023-09-06 07:59:05 403

第一步：搭建上传类基础工作，具体请看：//www.nhooo.com/article/120242.htm

第二步：建站一个product表，字段id,name,picurl.

第三步：生GII生成PRODUCT模型，类，视图。

第四步：

main.css放在frontend\web\css

.onedialog{position:absolute;left:300px;top:500px;z-index:10;width:700px;height:400px;border-radius:5px;box-shadow:5px2px6px#000;border:2pxsolid#666}
.oneiframe{width:100%;height:100%}

main.js放在frontend\web\assets

$(function(){
$('#product-picurl').click(function(){
$('#oneupload').remove();
$('').appendTo($('body')).attr({"class":"onedialog",'id':"oneupload"});
$('').appendTo($('#oneupload')).attr({"src":"?r=upload","class":"oneiframe"})
});
varv=$('#product-picurl').val();
if(v){
$('<img>').attr({"src":v,"style":"height:50px"}).insertAfter($('#product-picurl'));
}
});
</pre>
<p>然后在frontend\assets\AppAsset.php中注册这两个文件</p>
<pre>
classAppAssetextendsAssetBundle
{
public$basePath='@webroot';
public$baseUrl='@web';
public$css=[
'css/site.css',
'css/main.css',
];
public$js=[
'assets/main.js'
];
public$depends=[
'yii\web\YiiAsset',
'yii\bootstrap\BootstrapAsset',
];
}
</pre>
<p>UploadController.php</p>
<pre>
<?PHP
namespacefrontend\controllers;

useYii;
useyii\web\Controller;
useapp\models\UploadForm;
useyii\web\UploadedFile;

classUploadControllerextendsController
{
publicfunctionactionIndex()
{
$model=newUploadForm();

if(Yii::$app->request->isPost){
$model->file=UploadedFile::getInstance($model,'file');

if($model->file&&$model->validate()){
//$model->file->saveAs('uploads/'.$model->file->baseName.'.'.$model->file->extension);
$fileName='uploads/'.date("YmdHis").'.'.$model->file->extension;
$model->file->saveAs($fileName);
}
echo"<scriptsrc='assets/upload.js'></script>;";
echo"<script>";
echo"varoneinput=parent.document.getElementById('product-picurl');";
echo"parent.document.getElementById('product-picurl').value='".$fileName."';";
echo"varoneupload=parent.document.getElementById('oneupload');";
echo"varimg=document.createElement('img');";
echo"img.setAttribute('style','height:50px');";
echo"img.src='".$fileName."';";
echo"insertAfter(img,oneinput);";
echo"oneupload.parentNode.removeChild(oneupload)";
echo"</script>";
}

return$this->render('upload',['model'=>$model]);
}
}
?>

</pre>
<p>UploadForm.php</p>
<pre>
<?PHP
namespaceapp\models;

useyii\base\Model;
useyii\web\UploadedFile;

/**
*UploadFormisthemodelbehindtheuploadform.
*/
classUploadFormextendsModel
{
/**
*@varUploadedFilefileattribute
*/
public$file;

/**
*@returnarraythevalidationrules.
*/
publicfunctionrules()
{
return[
[['file'],'file'],
];
}
}
?>

</pre>
<p>upload.php</p>
<pre>
<?php
useyii\widgets\ActiveForm;
?>

<?php$form=ActiveForm::begin(['options'=>['enctype'=>'multipart/form-data']])?>

<?=$form->field($model,'file')->fileInput()?>

<button>Submit</button>

<?phpActiveForm::end()?>

</pre>
<p>以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。</p></section>
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